package com.bbc.util;

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class ImageUtils {
	 
    /**
     * 对图片进行放大
     * @param originalImage 原始图片
     * @param times 放大倍数
     * @return
     */
    public static BufferedImage  zoomInImage(BufferedImage  originalImage, Integer times){
        int width = originalImage.getWidth()*times;
        int height = originalImage.getHeight()*times;
        BufferedImage newImage = new BufferedImage(width,height,originalImage.getType());
        Graphics g = newImage.getGraphics();
        g.drawImage(originalImage, 0,0,width,height,null);
        g.dispose();
        return newImage;
    }
    /**
     * 对图片进行放大
     * @param srcPath 原始图片路径(绝对路径)
     * @param newPath 放大后图片路径（绝对路径）
     * @param times 放大倍数
     * @return 是否放大成功
     */
    public static boolean zoomInImage(String srcPath,String newPath,Integer times){
        BufferedImage bufferedImage = null;
        try {
            File of = new File(srcPath);
            if(of.canRead()){
                bufferedImage =  ImageIO.read(of);
            }
        } catch (IOException e) {
            //TODO: 打印日志
            return false;
        }
        if(bufferedImage != null){
            bufferedImage = zoomInImage(bufferedImage,times);
            try {
                //TODO: 这个保存路径需要配置下子好一点
                ImageIO.write(bufferedImage, "JPG", new File(newPath)); //保存修改后的图像,全部保存为JPG格式
            } catch (IOException e) {
                // TODO 打印错误信息
                return false;
            }
        }
        return true;
    }
    /**
     * 对图片进行缩小
     * @param originalImage 原始图片
     * @param times 缩小倍数
     * @return 缩小后的Image
     */
    public static BufferedImage  zoomOutImage(BufferedImage  originalImage, Integer times){
        int width = originalImage.getWidth()/times;
        int height = originalImage.getHeight()/times;
        BufferedImage newImage = new BufferedImage(width,height,originalImage.getType());
        Graphics g = newImage.getGraphics();
        g.drawImage(originalImage, 0,0,width,height,null);
        g.dispose();
        return newImage;
    }
    /**
     * 对图片进行缩小
     * @param srcPath 源图片路径（绝对路径）
     * @param newPath 新图片路径（绝对路径）
     * @param times 缩小倍数
     * @return 保存是否成功
     */
    public static boolean zoomOutImage(String srcPath,String newPath,Integer times){
        BufferedImage bufferedImage = null;
        try {
            File of = new File(srcPath);
            if(of.canRead()){
                bufferedImage =  ImageIO.read(of);
            }
        } catch (IOException e) {
            //TODO: 打印日志
            return false;
        }
        if(bufferedImage != null){
            bufferedImage = zoomOutImage(bufferedImage,times);
            try {
                //TODO: 这个保存路径需要配置下子好一点
                ImageIO.write(bufferedImage, "JPG", new File(newPath)); //保存修改后的图像,全部保存为JPG格式
            } catch (IOException e) {
                // TODO 打印错误信息
                return false;
            }
        }
        return true;
    }
    public static void main(String[] args) {
      //zoomInImage("D:\\doc\\img\\tb21.jpg","D:\\doc\\img\\tb21_l.jpg",4);
      //zoomOutImage("D:\\doc\\img\\c.gif","D:\\doc\\img\\c_2s.jpg",2);
    	//zoomOutImage("/Users/riecard/Desktop/100D3100/DSC_0016.JPG","/Users/riecard/Desktop/small_0016.JPG",1);
    	File f = new File("/Users/riecard/Desktop/100D3100");
    	File[] ff = f.listFiles();
    	for (File sub: ff) {
    		System.out.println(sub.getPath());
    		if (sub.getPath().endsWith("JPG")) {
    			zoomOutImage(sub.getPath(),sub.getPath().replace("100D3100", "100D3100_small"),1);
    		}
    	}
    }
 
}
